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Lone Tree, Colorado

City in Douglas County, Colorado

Air quality

The air at Lone Tree

Index 44, good, led by ozone. Read at 3 PM from its reporting area, Denver-Boulder (CO), 26 miles off.

44Good
  • Fine particles (PM2.5)29Good10.1 mi
  • Ozone44Good49 ppb4.6 mi
  • Coarse particles (PM10)11Good-
  • Nitrogen dioxide9Good10.5 ppb15.1 mi
  • Sulfur dioxide0Good0.7 ppb15.7 mi
  • Carbon monoxide-0.2 ppm15.1 mi

The days ahead

Good each day through Sat Oct 17, led by fine particles. Yesterday measured 39, good.

Smoke, the next 45 hours

No smoke near the ground through Sun 12 PM.

FriSatSun

Precipitation

What has fallen at Lone Tree

None in the last 24 hours; 0.08 in over the last 3 days, to Fri 3 PM. Measured by radar and rain gauges, as water.

Last 24 hours
0.00in
Last 3 days
0.08in

Visibility

How far you can see at Lone Tree, the next 45 hours

Visibility stays 10 miles or more through Sun 12 PM.

FriSatSun

On the radar over Lone Tree, ColoradoReflectivityStorm topsRain rateRain, last 24 hoursForecast temperatureForecast rain totalEvery picture

What is measuring near here

The 6 instruments nearest Lone Tree, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 0.3 miles away.

measured now4 instruments

FranktownFKTC2

At a river or reservoir gauge/12.5 mi away/6,221 ft/305 ft above here

temp, wind, gust, humidity, pressure

Rank648of 2,650

measured daily2 instruments

LonetreeLNTC2

At a cooperative observer's station/0.8 mi away/5,906 ft/10 ft below here

snowfall, snow depth, precip, high, low

Rank1,550of 2,650

Station report

The weather at Denver/Centennial, drawn

The nearest airport reporting now, 2.7 mi from Lone Tree, Colorado. From its report of Oct 16, 2026, 3:53 PM local time: 3 of its 6 sheets.

The sky

No cloud below 12,000 ft; visibility 10 mi or more.

Section of the sky over Denver/Centennial, height above the station to scale: no cloud detected below 12,000 feet, the reach of its ceilometer, and visibility of 10 mi or more.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT APAFIG. A THE SKY OVER DENVER/CENTENNIALSECTION, HEIGHT ABOVE THE STATION TO SCALE, EACH LAYER AT THE HEIGHT OF ITS BASE AS REPORTED; COVER IN EIGHTHS OF THE SKY; TOPS NOT MEASUREDFT ABOVE THE STATION05001,0001,5002,0002,5003,000ETAGESLOWTHE STATIONTHE CEILOMETER READS TO 12,000 FT, ABOVE THIS SHEETNO CLOUD DETECTED BELOW 12,000 FTVISIBILITY, MILES: 10 MI OR MORE0510TITLEDenver/Centennial, the skySTATION REPORT · ASOS APATYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-16IDSR-APA-1DRAWN AS linework on paperSOURCES FB-SKY-001

The air

58.0 F with a dew point of 4.0 F, 11 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 11,900 ft up.

Chart of the air at Denver/Centennial: temperature 58.0 degrees Fahrenheit and dew point 4.0, 11 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 11,900 feet above the station; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT APAFIG. B THE AIR AT DENVER/CENTENNIALTHE REPORTED TEMPERATURE AND DEW POINT, AND AIR LIFTED FROM THE STATION WITHOUT MIXING UNTIL IT SATURATES; HEIGHT ABOVE THE STATION TO SCALEFT ABOVE THE STATION02,0004,0006,0008,00010,00012,00014,000-20 F0 F20 F40 F60 FSATURATES 11,900 FT ABOVE THE STATION, AT -5.8 FTEMPERATURE 58.0 FDEW POINT 4.0 FSPREAD 54.0 FRELATIVE HUMIDITY 11 PER CENTTHE AIR COOLS ABOUT 5.4 F EACH 1,000 FT IT RISES, AND ITS DEW POINT ABOUT 1 FSOLID: THE LIFTED AIR'S TEMPERATURE; DASHED: ITS DEW POINTTITLEDenver/Centennial, the airSTATION REPORT · ASOS APATYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-16IDSR-APA-2DRAWN AS linework on paperSOURCES FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

At 3 mph: force 1, a light air on the Beaufort scale.

Plan of the wind at Denver/Centennial, north up: at 3 miles an hour; beside it the Beaufort scale from calm to hurricane force, force 1, light air, marked.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT APAFIG. C THE WIND AT DENVER/CENTENNIALPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONDIRECTION NOT REPORTEDBEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR1NOW, 3 MPH2LIGHT BREEZE43GENTLE BREEZE84MODERATE BREEZE135FRESH BREEZE196STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLEDenver/Centennial, the windSTATION REPORT · ASOS APATYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-16IDSR-APA-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

The full report of Denver/Centennial, in 6 sheets, each beside the Field Book plates that explain it

0in

Snow on the ground

Measured at Lonetree (LNTC2), 0.8 miles from here, read 16 Oct, 07:00. measured daily

Elsewhere in Colorado

41 places, each with its own forecast and its own instruments.

Near Lone Tree

The nearest places, each with its own forecast and the instruments nearest it.

Near Lone Tree

River and lake gauges